asterisk users - Apr 2005 - Follow-me script - user changeable options

I have a company wants a pbx that has follow-me type rules, i.e., the user
has a series of contact numbers comprising of home numbers, overseas
numbers, cell phone numbers, and they are dialed in sequence. This is easy
enough but the option they want that I am having trouble with is the ability
for the user to dial a number and specify their extension/password to
authenticate, then they are able to change the main umber to first try so
that they control the routing of the call.
The idea here is that when the user travels they can set what is their
primary  number to be reached at.

Any ideas?

Chris Mason
NetConcepts
(264) 4897-5670 Fax: (264) 497-8463
Int:  (646)722-0001 Fax: (815)301-9759 
Yahoo IM: netconcepts_anguilla@yahoo.com